/*package c05_set_hashset;

import java.util.HashSet;

public class Test2 {
    public static void main(String[] args) {
        HashSet<Student> students = new HashSet<>();

        Student s1 = new Student("张三", 18);
        Student s2 = new Student("李四", 18);
        Student s3 = new Student("王五", 18);
        students.add(s1);
        students.add(s2);
        students.add(s3);
        for (Student student : students) {
            System.out.println(student);
        }
    }
}*/
